goinstall: don't hit network unless a checkout or update is required

R=rsc, rogpeppe
CC=golang-dev
https://golang.org/cl/5343042

OpenSSL 1.0.0 has switched to generating PKCS#8 format private keys by
default. This change allows http.ListenAndServeTLS to work with either
types of keys.

See http://groups.google.com/group/golang-nuts/browse_thread/thread/84715b5f0c9e3c30/63a8a27b53e102a6

R=bradfitz
CC=golang-dev
https://golang.org/cl/5416059

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5415062

Before
json.BenchmarkCodeEncoder  10  181232100 ns/op  10.71 MB/s
json.BenchmarkCodeMarshal  10  184578000 ns/op  10.51 MB/s

After:
json.BenchmarkCodeEncoder  10  146444000 ns/op  13.25 MB/s
json.BenchmarkCodeMarshal  10  151428500 ns/op  12.81 MB/s

R=rsc, r
CC=golang-dev
https://golang.org/cl/5416046

For amd64, from 127 to 105 ns/op; for 386, from 208 to 169 ns/op.

R=rsc, golang-dev
CC=golang-dev
https://golang.org/cl/5412056

exec_plan9.go:
. Adjusted return argument to match other changes.
#mksyscall.pl:
. Replaced "err = e1" with "err = NewError(e1)".
* Change abandoned, Russ made a better suggestion involving
  syscall_plan9.go.
syscall_plan9.go:
. Removed redundant "err = nil" lines.
. Adjusted //sys lines for mksyscall.pl.
* Replaced "err string" with "err ErrorString" in return arguments.
zsyscall_plan9_386.go:
. This module ought to be generated, but as it exists in the
  repository, I rebuilt it and checked that it matched expectations.
  Anybody is welcome to remove this from the repository if
  they feel it should go, but remember that not all Plan 9
  installations have a working Perl.

R=rsc
CC=ality, golang-dev
https://golang.org/cl/5411046

Also introduce a new insertion heuristic:
insert new import next to existing import
with the longest matching prefix.

R=golang-dev, adg, gri
CC=golang-dev
https://golang.org/cl/5412053

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5415055

This CL inverts the direction of the Stdin/out/err members of the
Session struct so they reflect the API of the exec.Cmd. In doing so
it borrows heavily from the exec package.

Additionally Shell now returns immediately, wait for completion using
Wait. Exec calls Wait internally and so blocks until the remote
command is complete.

Credit to Gustavo Niemeyer for the impetus for this CL.

R=rsc, agl, n13m3y3r, huin, bradfitz
CC=cw, golang-dev
https://golang.org/cl/5322055

My excuse for doing this is that test cases with newlines in them didn't
work. But instead of just fixing that, I rearranged everything in
parse_test.go to use fewer channels and pipes, and just call a
straightforward function to read test cases from a file.

R=nigeltao
CC=golang-dev
https://golang.org/cl/5410049

x-go-binding.googlecode.com.

R=rsc, rogpeppe
CC=golang-dev
https://golang.org/cl/5406041

R=golang-dev, mikioh.mikioh, rsc
CC=golang-dev
https://golang.org/cl/5369092

Slight slow-down for printer benchmark (-0.7%) before
applying CL 5416049 (which will wash it out). Code is
cleaner and simpler.

R=rsc
CC=golang-dev
https://golang.org/cl/5417053

R=adg, golang-dev
CC=golang-dev
https://golang.org/cl/5417052

R=rsc
CC=golang-dev
https://golang.org/cl/5316059

Cleanup and slight performance improvement (1.5%).

Before (best of 3 runs):
printer.BenchmarkPrint	      50	  47377420 ns/op

After (best of 3 runs):
printer.BenchmarkPrint	      50	  46707180 ns/op

R=rsc
CC=golang-dev
https://golang.org/cl/5416049

Fixes #2327.

R=golang-dev, rsc, roberto, jdpoirier
CC=golang-dev
https://golang.org/cl/5375049

See http://weekly.golang.org/pkg/html/template/

R=golang-dev, r, rsc
CC=golang-dev
https://golang.org/cl/5413055

R=golang-dev
CC=golang-dev, rsc
https://golang.org/cl/5411048

R=mpimenov, rsc
CC=golang-dev, remy
https://golang.org/cl/5376082

Preamble to the simplification of the template API.
Although the signature of Parse (nee Set) changes,
it's really an internal function, used only by
text/template.

R=golang-dev, rsc, gri, r
CC=golang-dev
https://golang.org/cl/5415052

Thanks to Jeff R. Allen for pointing them out.

R=bradfitz, gri
CC=golang-dev
https://golang.org/cl/5412052

Gives other projects the benefit of the gofmt presubmit.
Results in minor changes in the doc/ directory:
        find doc -name \*.go -exec gofmt -d {} \;

R=rsc, gri
CC=golang-dev
https://golang.org/cl/5158042

R=r
CC=golang-dev
https://golang.org/cl/5413052

R=golang-dev, dsymonds, r
CC=golang-dev
https://golang.org/cl/5416045

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5417049

R=golang-dev
CC=ality, golang-dev, rsc
https://golang.org/cl/5364063

Update version check from 1.4 to 1.9.  Suggest 2.0.

R=golang-dev, r, r
CC=golang-dev
https://golang.org/cl/5413046

R=dave, agl, taruti, rsc, r
CC=golang-dev
https://golang.org/cl/5342057

R=r
CC=golang-dev
https://golang.org/cl/5413049

deps.bash does not understand current format,
so make.bash fails (with MAKEFLAGS=-j20).

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5410046

Breaks with hg 1.6.4. Roll back until it's fixed.

««« original CL description
codereview: cleanup + basic tests

R=adg, bradfitz
CC=golang-dev
https://golang.org/cl/5395044
»»»

R=golang-dev
CC=golang-dev
https://golang.org/cl/5410047

Parse {{define}} blocks during template parsing rather than separately as a set-specific thing.
This cleans up set parse significantly, and enables the next step, if we want, to unify the
API for templates and sets.
Other than an argument change to parse.Parse, which is in effect an internal function and
unused by client code, there is no API change and no spec change yet.

R=golang-dev, rsc, r
CC=golang-dev
https://golang.org/cl/5393049

R=adg, bradfitz
CC=golang-dev
https://golang.org/cl/5395044

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5415046

Also include exp/terminal in linux build so such failures
are noticed.

R=rsc
CC=golang-dev
https://golang.org/cl/5416044

R=paulzhol, rsc, dave, rminnich
CC=golang-dev
https://golang.org/cl/5327063

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5411045

It looks like not all computers have
mime type for .wav extension.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5415045

The installer now: allows a user to select an alternative
install directory, it now adds a Go folder to the Programs
Menu, and it places two shortcuts on the user's desktop.
The Program Menu folder contains shortcuts to the uninstaller
and two batch files, go.bat and godoc.bat. The desktop
shortcuts also point to go.bat and godoc.bat.

go.bat sets the Go environment, including Path, and spawns a
Window's shell. godoc.bat starts the godoc server at
localhost:6060 then spawns a browser window pointing to the
document server.

Setting the environment temporarily and spawning a shell, via
go.bat, should be safer than messing with the system's environment
and it makes the user experience a bit more streamlined.

The packager does work in its current state but it still needs
some polishing. And yes, the plan is to add a dialogue to allow
the user to decline the desktop shortcuts.

R=rsc, alex.brainman, tjyang2001
CC=golang-dev
https://golang.org/cl/5399042